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借助SEM及其附件EBSD等检测手段,对不同常化工艺后的稀土微合金化高牌号无取向硅钢试样表层及心部组织进行了表征和分析,研究了常化工艺对稀土微合金化高牌号无取向硅钢组织变化的影响。结果表明:常化过程中试样表层与心部存在着不同温度梯度,试样表面更容易发生再结晶行为;800℃×3 min、900℃×3 min的常化工艺不能使试样完全发生再结晶,而1000℃×3 min的常化工艺会使试样再结晶晶粒异常长大;实验钢在900℃×4 min的常化工艺下组织均匀,有利于后续冷轧加工。
With the help of SEM and its attachment EBSD, the surface and core tissues of high-grade non-oriented silicon steel samples of rare earth micro-alloying after different normalization process were characterized and analyzed. The effect of normalizing technology on the micro-alloying of rare earth Effect of Non-Oriented Silicon Steel Structure Changes on Grades. The results show that there are different temperature gradients in the surface and the heart of the sample during the normalization process, and the recrystallization behavior is more likely to occur on the sample surface. The normalization process at 800 ℃ × 3 min and 900 ℃ × 3 min can not make the sample completely take place Recrystallization. However, recrystallization grains grow abnormally at 1000 ℃ for 3 min. The microstructure of the test steel is uniform under the normalizing process of 900 ℃ × 4 min, which is favorable for the subsequent cold rolling.